<template>
	<view>
		<!-- 使用组件 -->
		<!-- <my-search :bgcolor="'pink'"  :radius="4"></my-search> -->
		<my-search @click="gotoSearch"></my-search>
		<view class="scroll-view-container">
			<!-- 左侧的滑动区域 -->
			<scroll-view class="left-scroll-view" scroll-y="true" :style="{height:wh+'px'}">
				<block v-for="(item,i) in cateList" :key="i">
					<view :class="['left-scroll-view-item',i===active?'active':'']" @click="activeChanged(i)">{{item.cat_name}}</view>
				</block>
				
			</scroll-view>
			<!-- 右侧的滑动区域 -->
			<scroll-view  :scroll-top="scrollTop" scroll-y="true" :style="{height :wh+'px'}">
				
			
				<view class="cate-lv2" v-for="(item2,i2) in cateLevel2" :key="i2">
					<!-- 二级分类的标题 -->
					<view class="cate-lv2-title">/{{item2.cat_name}}/</view>
					<!-- 当前二级分类下的三级分类列表 -->
					<view class="cate-lv3-list">
						<view class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
							<!-- 三级分类的图片和文本 -->
							<image :src="item3.cat_icon"></image>
							<text>{{item3.cat_name}}</text>
						</view>
					</view>
				</view>
				
			</scroll-view>
		</view>
	</view>
	
</template>

<script>
	export default {
		
		data() {
			return {
				//当前设备可用的高度
				wh:0,
				cateList:[],
				active:0,
				//二级分类列表
				cateLevel2:[],
				scrollTop:0
			};
		},
		onLoad(){
			const sysInfo=uni.getSystemInfoSync()
			this.wh=sysInfo.windowHeight-50
			
			
			this.getCateList()
			
		},
		methods:{
			//获取分类列表的数据
			async getCateList(){
			const {data:res} =	await uni.$http.get('/api/public/v1/categories')
			if(res.meta.status!==200) return uni.$showMsg()
			this.cateList=res.message
			//为二级分类赋值
			this.cateLevel2=res.message[0].children
			},
			activeChanged(i){
				this.active=i
				
				//重新为二级分类赋值
				this.cateLevel2=this.cateList[i].children
				//为scroll重新赋值为0
				this.scrollTop=this.scrollTop===0?1:0
			},
			//跳转到商品列表页面
			gotoGoodsList(item){
				uni.navigateTo({
					url:'/subpkg/goods_list/goods_list?cid='+item.cat_id
				})
			},
			gotoSearch(){
				uni.navigateTo({
					url:'/subpkg/search/search'
				})
			}
			
			
			
			
		}
	}
</script>

<style lang="scss">
	.scroll-view-container{
		display:flex;
	}
	.left-scroll-view{
		width:120px;
		.left-scroll-view-item{
			background-color: #F7F7F7;
			line-height: 60px;
			text-align: center;
			font-size: 12px;
			&.active{
				background-color: #FFFFFF;
				position: relative;
				&::before{
					content:' ';
					display:block;
					width:3px;
					height:30px;
					background-color: #c00000;
					position: absolute;
					top:50%;
					left:0;
					transform:translateY(-50%)
				}
			}
		}
	}
	.cate-lv2-title{
		font-size:12px;
		font-weight: bold;
		text-align: center;
		padding:15px 0;
	}
	.cate-lv3-list{
		display: flex;
		flex-wrap: wrap;
		.cate-lv3-item{
			display: flex;
			flex-direction: column;
			width:33.33%;
			justify-content: center;
			align-items: center;
			margin-bottom: 10px;
			
			image {
				width:60px;
				height: 60px;
			}
			text {
				font-size: 12px;
			}
		}
	}
	
</style>
